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Bohr’s Model and Physics of Atom — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsBohr’s Model and Physics of Atom2 Marks
Question
Light from Balmer series of hydrogen is able to eject photoelectrons from a metal. What can be the maximum work function of the metal?
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Answer

The maximum energy liberated by the Balmer Series is $\text{n}_1=2,\text{ n}_2=\infty$$\text{E}=13.6\bigg(\frac{1}{\text{n}^2_1}-\frac{1}{\text{n}^2_2}\bigg)=13.6\times\frac{1}{4}=3.4\text{ev}$
3.4ev is the maximum work function of the metal.

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